Ordering Recommendation

Trough level quantitation for evaluation of patients treated with ustekinumab.

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation

Collect immediately before next scheduled dose (trough).

Collect

Serum separator tube (SST). Also acceptable: Plain red.

Specimen Preparation

Transfer 0.5 mL serum to an ARUP standard transport tube. (Min: 0.35 mL)
Test is not performed at ARUP; separate specimens must be submitted when multiple tests are ordered.

Storage/Transport Temperature

Refrigerated. Also acceptable: Frozen.

Unacceptable Conditions

Heat-inactivated specimen

Remarks
Stability

Ambient: Unacceptable; Refrigerated: 21 days; Frozen: 21 days

Methodology

Enzyme-Linked Immunosorbent Assay (ELISA)

Performed

Varies

Reported

5-8 days

Reference Interval

By report

Interpretive Data



Compliance Category

Performed by non-ARUP Laboratory

Note

Hotline History

N/A

CPT Codes

80299; 83520

Components

Component Test Code* Component Chart Name LOINC
3005926 Ustekinumab Quantitation, Serum 87408-1
3005927 Ustekinumab Antibodies, Serum 87409-9
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.

Aliases

  • Stelara
Ustekinumab Quantitation with Antibodies, Serum

Mayo Clinic Laboratories